@polkadot/util-crypto/json/encrypt.js

// Copyright 2017-2022 @polkadot/util-crypto authors & contributors
// SPDX-License-Identifier: Apache-2.0
import { u8aConcat } from '@polkadot/util';
import { naclEncrypt } from "../nacl/index.js";
import { scryptEncode, scryptToU8a } from "../scrypt/index.js";
import { jsonEncryptFormat } from "./encryptFormat.js";
export function jsonEncrypt(data, contentType, passphrase) {
  let isEncrypted = false;
  let encoded = data;

  if (passphrase) {
    const {
      params,
      password,
      salt
    } = scryptEncode(passphrase);
    const {
      encrypted,
      nonce
    } = naclEncrypt(encoded, password.subarray(0, 32));
    isEncrypted = true;
    encoded = u8aConcat(scryptToU8a(salt, params), nonce, encrypted);
  }

  return jsonEncryptFormat(encoded, contentType, isEncrypted);
}